Thanks for the suggestion, Frances. However, there are issues:
  • I want to be able to navigate the slides without moving the mouse cursor. Because, I will be talking at the same time, facing the audience.
  • The vector graphics are converted to bitmap graphics. I just tried that out. So, the web-based presentation is not resolution independent.
  • Some sample presentation that I tried looked pretty clunky, with unpleasant page refreshes when switching to a slide.

I am currently leaning towards the PDF approach.